Run a basic example
docker build -t hello .
[+] Building 4.5s (6/6) FINISHED
=> [internal] load build definition from Dockerfile 0.0s
=> => transferring dockerfile: 331B 0.0s
=> [internal] load .dockerignore 0.0s
=> => transferring context: 2B 0.0s
=> [internal] load metadata for docker.io/library/busybox:latest 3.5s
=> [1/2] FROM docker.io/library/busybox@sha256:6bdd92bf5240be1b5f3bf71324f5e371fe59f0e153b27fa1f1620f78ba16963c 0.5s
=> => resolve docker.io/library/busybox@sha256:6bdd92bf5240be1b5f3bf71324f5e371fe59f0e153b27fa1f1620f78ba16963c 0.0s
=> => sha256:6bdd92bf5240be1b5f3bf71324f5e371fe59f0e153b27fa1f1620f78ba16963c 2.29kB / 2.29kB 0.0s
=> => sha256:dacd1aa51e0b27c0e36c4981a7a8d9d8ec2c4a74bf125c0a44d0709497a522e9 527B / 527B 0.0s
=> => sha256:bc01a3326866eedd68525a4d2d91d2cf86f9893db054601d6be524d5c9d03981 1.46kB / 1.46kB 0.0s
=> => sha256:22b70bddd3acadc892fca4c2af4260629bfda5dfd11ebc106a93ce24e752b5ed 772.99kB / 772.99kB 0.4s
=> => extracting sha256:22b70bddd3acadc892fca4c2af4260629bfda5dfd11ebc106a93ce24e752b5ed 0.1s
=> [2/2] RUN echo "building simple docker image" 0.3s
=> exporting to image 0.0s
=> => exporting layers 0.0s
=> => writing image sha256:0d4d3c16fc2129fd78cf8300c853d747b932c955b9cee357d3ecdfb1b8078d14 0.0s
=> => naming to docker.io/library/hello
docker run --rm hello
Hello containerMulti-stage build
# Initial dockerfile
docker build -f ./Dockerfile.multi -t too-big .
docker run --rm too-big
google is this big
6 14 220
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
<none> <none> bf2a83deaefa About a minute ago 182MB
too-big latest f30f79cf7a19 About a minute ago 182MB
hello latest 0d4d3c16fc21 30 minutes ago 1.24MB
# Improved dockerfile
docker build -f ./Dockerfile.multi2 -t too-big-2 .
docker run --rm too-big-2
google is this big
6 14 220
docker images
REPOSITORY TAG IMAGE ID CREATED SIZE
too-big-2 latest d4d4eaa03b2b 23 seconds ago 5.54MB
<none> <none> bf2a83deaefa 7 minutes ago 182MB
too-big latest f30f79cf7a19 7 minutes ago 182MB
hello latest 0d4d3c16fc21 35 minutes ago 1.24MB